Bobbin holder



-I' sept. 8, 1931. E C, METCALF 1,822,858

BOBBIN HOLDE R Filed sept. 1o, 195o lum ' 20 Figure 2 is a top plan view;v

Patented Sept. 8, 1931 uN-iran' kslra'rss.

Y ELTON c.` METCALF; or 'WRENTHANL MAsSAcHUsETTS, ASSIeNon Tor/"maroon a GEB coMPANnjoF FRANKLIN, MASSACHUSETTS BOBBN HOLDER Applicationled September 10, 1930. Serial No. 480,914.

v This invention relates to certain newA and useful improvements in'bobbin holders. and theiprimary object thereoiis to improve the means for pivotally mounting the jaws, :5) whereby tocause the bobbin to be accurately held and toV run true, without requiring accurate placement of the `bobbin on the holder.

A further object of the invention is to providev aholder which is readily adaptable for use with bobbins of varying sizes and further to'y provide means of the character just mentioned whichacts to securely maintain the clamping member 'for `the jaws in position, and to also prevent excessive inward strain 1li Such as might effect injury to the clamping member.

In the drawings; Figure 1 is a side elevation of the-invention;

Figure 3 is-.a sectionon Aline `3---3 of ure 1. v f j Figure 4 is a section on line 4-4 of Figure 1. v

1 Figure5isa viewsimilar to Figure 3 of a modilied form of the invention and Figure `6 isa top plan view of Figure 5.

In proceeding in accordance with the present Vinvention a base member 1 is provided which is of substantially cup-shape and which, is provided with an opening 2 in the center of its bottom. Three bobbin engaging jaws 3 are employed, each being of substantially L or right angular form and having the free end portions of the jaws curved at 4 to provide a seat for a coil spring 5, the latter being of circular form and acting to move the convex faces 6 of the jaws against the bobbin (not shown). The lower ends of the jaws 3 are provided with outwardly extending pintles or lugs 6, which lugs are disposed on the opposite sides of the feet 7 of the jaws. For the purpose of pivotally mounting each of the three jaws a fulcrum member 8 is provided, the member being formed with a triangular arrangement of pairs of sockets or bearings 9 in which the lugs or pintles 6 engaOfe. The fulcrum member 8 is further provided with arms 10 that project outwardly of .50 the sockets or bearings 9 and which engage Figthe opposite sides of the 'eetof the jaws sol as to prevent the aws from having otherthan a pivotal movement. The side arms 10.01: the member 8 are provided withupwardprojections 11 to engage a flat washer 12, which latterseats upon the member 8 and engages the feet 7 of the jaws as shown particularly in Figure 3. A cup member 13 seats upon the washer 7 and' has its rim turned outwardly at 14 to provide an abutment which re'- stricts inward pivotal movement of the jaws under the tension of the spring 5. For the purpose of securely relating the parts as above described, a hollow rivet 15 is provided which has a shoulder 16 `against which` the bottom ofthe base member 1 abuts and which has'its free upper end 17 .spun or flanged outf wardly so as to tightly clamp the parts 13',

v12, and 8, against the circular shoulder'16.

It will be understood that the usual spindle is received through the hollow interior of the rivet 15. v y

' With the form of cup member described in connection with Figures 1fto 4 it will be seen that bobbins of varying diameters can be accommodated due to the wplane upper face of the cup 13.

In Figures 5 and 6 `amodiiied form ofthe invention is disclosed and whereinthe pafrts corresponding to those describedin .connection with the preferred form of theinvention in Figures 1 and 2,. 3 and 4 are provided with prime marks, these parts being of identicall construction to the corresponding parts of Figuresl to 4. vThe only difference resides in that of the cup member 13', which latter is provided with anoutwardly struckcircular bead 17 which beadA as shown in Figure 5 of the drawings is of concavo-convexcross section.` In this form ,of the invention same is adapted to bobbins of a dei'inite or predetermined size which latter arel engaged by the circular bead 17 and held in positionv thereby. f i l In all the forms of the invention it will be seen that theparts are brought into close relaf tion providing a very compact arrangement and one in which all: of the parts can be connected. by a rivet of veryl short length, thus providing a structure which-not only occupies .10

a minimum of s ace, but also one wherein the parts, due to t eir close relation mutually brace and strengthen one another. It will further be noted that the feet of the jaws are completely housed within the base member and are accordingly protected thereby.

Having thus described my inventionl what I claim as new and desire to secure by Letters Patent is l. In a bobbin holder, a base `member of substantially cup-shape substantially L- shaped jaws having their feet disposed within the base member and provided on their sides with oppositelyextending pintles, a fulcrum member common to all of the jaws having socket portions to receive the pintles of the respective jaws and having arms which extend along the sides of the jaws, the arms being provided with upwardly extending projections, and acting to hold the jaws against other than pivotal movement, a washer seated on the upper face of the fulcrum member and overlying the` feet of the jaws to prevent upward movement of the jaws out of the base member, a circular coil spring engaged about the outer ends ofthe jaws to tension same, a bobbin supporting member ofsubstantially cup shape superimposed upon said washer, and ya hollow rivet extending through the base member, the ulcrum member, the washer, and the bobbin supporting member and being headed into engagement therewith Yto rigidly connect said parts. j

2. In a bobbin holder, a basemember of substantially cup shape, substantially L shaped jaws having their feet disposed with* in thebase member and vprovided on their sides with oppositely extending pintles, a fulcrum member common to all of the aws having socket portions to receive the pintles of the respective jaws and having arms which extend along the sides'of the jaws, and thearms being provided with upwardly extending projections, and acting to hold the jaws against other than pivotal movement, a washer seated on the upper face of the fulcrum member and overlying the feet of the jaws to prevent upward: movement of the jaws out of the base member, a .circular coil spring engaged about the outer ends of the shaped jaws having their feet disposed within the base member and provided on their sides with oppositely extending pintles a fulcrum member common to all of the jaws having socket portions to receive the pintles of the respective jaws and havingvv arms which extend along the sides ofthe jaws, the arms being provided with upwardly extending projections, and v acting tohold the jaws against other thanv pivotal movement, a washer seated'on the upper facefof the fulcrum member and overlying the feet of the jaws to prevent upward movement of the jaws out of the -base member, a circular coil spring engaged about the outer ends of the jaws to tension same, a bobbin supporting member of substantially cup shape superimposed upon saidwasher, said cup-like member having its rim formed to engage the jaws to restrict inward movement thereof under tension of the spring, and thebottom of the cup like bobbin supporting member 'being formed with an intermediate circular bead to engage the bobbin, and a hollow rivet extending through the ibase member, thevfulcrum `member, the washer, and the bobbin supporting member and being headed intoengagement therewith to rigidly connect said parts. f y

4. In combination with a basemembena I series of jaws having feet disposed on the base member and providedwith` pintles, fulcrum means common to all of the jaws and having portions to receive the pintles whereby to pivotally mount the jaws, a member engaged over saidfulcrum means and extending over the jaws to prevent outward movement'thereof relative to the base member, a bobbin supporting member seated 'on said irst named member, and means to rigidly connect thebase member, the fulcrum means, the second named member land wthe bobbin supporting member. In testimony whereof I Vhave jhereunto signed my name.

, mfroNy o. METGALFQ i' jaws to tension same, a .bobbin supporting i member of substantially .cup shape superimposed upon said washer, and a hollow rivet extending through the base member, the fulcrum member, the washer, and the bobbin supporting member and being headed into engagement therewith to rigidly connect said parts, the rim of the cup like bobbin supporting member havin@ its ,free edO'e turned outwardly to engage thejaws and to restrict inward movementthereof under the tension of the spring.

3. In a bobbin holder, a base member of Y substantially cup-shape, substantially L-. 

